Java程序---素数

package com.junlin;

import java.util.Scanner;

public class sushu {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		System.out.print("请输入起始值：");
		int a=sc.nextInt();
		System.out.println();

		System.out.print("请输入截止值：");
		int b=sc.nextInt();
		System.out.println();

		for(int i = a;i< b;i ++) {
			boolean flag=true;
			if(i<2){
				i=2;
			}else{
				for(int j = 2;j< i;j ++){
					if(i%j == 0){
						flag=false;
						break;
					}
				}
			}
			if(!flag){
				continue;
			}
			System.out.println(i);
		}
	}


}